De'Longhi
Compressor Not Starting
De'Longhi dehumidifier powers on but the compressor never starts; only the fan runs continuously.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Faulty compressor start relay/PTC, Open compressor winding, Defective control board relay, Safety lockout due to sensor error
How to Fix / Troubleshooting
Safety first: Unplug the unit. Compressor terminals carry mains voltage.
Step-by-step:
- 1. Check for error codes: Look at the display for any codes (E5, EC, etc.) and address those first.
- 2. Listen for relay click: When the unit calls for dehumidification, you should hear a click from the control board relay. If there is no click, the board may not be energizing the compressor.
- 3. Inspect start device: Access the compressor compartment and remove the start relay/PTC from the compressor pins. Check for burn marks or rattling pieces inside. Replace if suspect.
- 4. Test after replacement: Install a new De'Longhi-compatible start device, reassemble, and test. If the compressor still does not start and there are no error codes, the compressor or PCB may be faulty.
- 5. Technician diagnosis: Measuring compressor winding resistance and live voltage should be done by a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Compressor Start Relay / PTC
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